Highlights
Jun 17, 2019
UNL Materials Research Science and Engineering Center (2014)
Interfacial Charge Engineering in Ferroelectric-Gated Mott Transistors
X. Chen, X. Zhang, M. A. Koten, Z. Xiao, L. Zhang, Jeffrey E. Shield, Peter A. Dowben and Xia Hong (University of Nebraska - Lincoln)
Nebraska MRSEC researchers have fabricated complex oxide heterostructures with atomic precision, exploiting them to build a prototype nonvolatile Mott transistor.
Jun 12, 2019
Harvard Materials Research Center (2014)
Building Enduring Pathways in STEM: Incorporating Traditional Ways of Knowing in Materials Research
This unique partnership between Navajo Technical University and the Harvard MRSEC will build enduring pathways for undergraduate Native American students into STEM by including traditional tribal perspectives and methods of scientific inquiry in materials science research and education.
Jun 12, 2019
Harvard Materials Research Center (2014)
Acoustophoretic Printing: Printing Soft Materials with Sound
To enhance drop formation, a team at the Harvard MRSEC led by Lewis created a new printing method that relies on generating sound waves to assist gravity, dubbing this new technique acoustophoretic printing.
Jun 10, 2019
CU Boulder Soft Materials Research Center (2014)
Microreactors for Abiotic Ligation of nanoRNA
The scientific understanding of evolution is extensive, but limited by some notable, if not embarrassing, gaps. Among the great challenges of basic science is to understand the origin of life, and, in particular, the origin of the double helix structure of stacked base pairs of DNA and RNA, life’s most remarkable molecular creation.
Jun 10, 2019
CU Boulder Soft Materials Research Center (2014)
Hydrogels from DNA mimicking polymers and DNA
X. Han1, D.W. Domaille1, B.D. Fairbanks1, L. He1, H.R. Colver1, X. Zhang1, J.N. Cha1, C.N. Bowman1 1 Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA.
Radical, light initiated chemical reactions were used to synthesize multifunctional, star-shaped polmyers with each chain end bound to a DNA mimicking polymer (the “Click Nucleic Acid or CNA developed with the support of the NSF).
Jun 6, 2019
Princeton Center for Complex Materials (2014)
The Role of Chain Connectivity Across an Interface on the Dynamics of a Nanostructured Block Copolymer
D. Christie1, R.A. Register1, R.D. Priestley1, “The Role of Chain Connectivity Across an Interface on the Dynamics of a Nanostructured Block Copolymer,” Physical Review Letters, 121, 247801 (2018). 1Princeton University
Princeton investigators developed an approach to directly measure the influence of chain connectivity on the glass transition temperature of copolymers for the first time. This development is important as it provides insights into the design of copolymer interfaces for applications in which transport of entities is important.
Jun 6, 2019
Princeton Center for Complex Materials (2014)
Controllable electron flow in quantum wires
M. T. Randeria1, K. Agarwal1, B. E. Feldman2, H. Ding1, H. Ji1, R. J. Cava1, S. L. Sondhi1, S. A. Parameswaran3 and A. Yazdani1 1 Princeton Univesity, 2 Stanford University 3 University of Oxford
Princeton investigators detected channels of conducting electrons that form between two quantum states on the surface of a bismuth crystal subjected to a high magnetic field. These two states consist of electrons moving in elliptical orbits with different orientations. The researchers found that the current flow in these channels can be turned on and off, making these channels a new type of controllable quantum wire.
May 20, 2019
NYU Materials Research Science and Engineering Center (2014)
Freely Jointed Polymers Made of Droplets
Angus McMullen, Miranda Holmes-Cerfon, Francesco Sciortino, Alexander Y. Grosberg, and Jasna Brujic, New York University
Here, we control the valence of DNA-functionalized emulsion droplets to make flexible colloidal polymers. We examine their conformational statistics to show that they are freely jointed. We demonstrate that their end-to-end length scales with the number of bonds in agreement with 2D Flory theory, and that their diffusion follows the Zimm model.
May 20, 2019
NYU Materials Research Science and Engineering Center (2014)
A Fully Voltage-Controlled Spin Logic Device
Rakheja, Flatté and Kent, New York University
An important goal in electronics is to reduce power use without sacrificing performance. In spintronics this can be accomplished by increasing the rate of charge to spin conversion. We show that one of the most efficient means of converting charge to spin information uses a topological insulator and voltages instead of currents.
May 20, 2019
Center for Precision Assembled Quantum Materials (PAQM)
Hierarchical Coherent Phonons
Xiaoyang Zhu, Xavier Roy, Colin Nuckolls, Center for Precision Assembly of Superstratic and Superatomic Solids
The coupling of phonons to electrons, excitons and other phonons plays a defining role in material properties, including charge and energy transport, light emission, and superconductivity. In atomic solids such as Si or GaAs, phonons are delocalized over the three-dimensional (3D) lattice and are determined by bonding and crystal symmetry. In molecular materials, by contrast, localized molecular vibrations couple to electrons to produce, for example, high temperature superconductivity, as in A3C60.
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